Geolog

The schematic seems to be OK. My IGA clone works but with low sensitivity. Maybe the antena is the big secret. When i clean the disks then it has the double sensitivity. Also the C27 (100pf) is very critical. If it has lower value then the sensitivity is low, if value is big then it oscillates!!! I use 2 disks from Hard disk for the antenna and i am not sure if it is OK.

Thank you!!

Thank you. I did n't find anything else for caves except systems that measure the earth resistance but are not so usefull. I think that better way is to find a IGA-1 user that knows it so to help me. But here at my country (Greece) i did n't find nobody. BTW... do you know any eshop at Russia that can post ICs (K140UD13) at Greece??? Regards

Sorry i don't understand what you mean. A friend from Bulgaria said me that IGA has the ability to locate caves easy....

Hello. I constructed a clone of IGA-1. Does anyone knows at who frequency i must adjust it so to find caves. Thank you.